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CHEM 11 SMC Gravimetric Analysis of An Unknown Sulfate Lab Report

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Santa Monica College Name: Mingyao Sun M Lab Partner: Chemistry 11 Date: 07/10/20 Lab Section: 4014 Lab Report: Gravimetric Analysis of an Unknown Sulfate Experimental Data Unknown Sulfate ID Code: #23 1. Mass of empty 250-mL beaker 129.536g 2. Mass of 250-mL beaker and unknown sulfate 129.840g 3. Mass of unknown sulfate 0.304g 4. Mass of empty crucible (without lid) 10.320g 5. Mass of crucible (without lid) and barium sulfate 10.723g 6. Mass of barium sulfate 0.403g Calculations and Conclusions 1. Calculate the mass of sulfate in the unknown sample. Clearly show each step of your calculation. Mass of barium sulfate = 0.403g Number of mole of barium sulfate = 0.403g / 233.3896g/mol = 0.00173mol Mass of sulfate in barium sulfate = 96.06g/mol * 0.00173mol =0.166g Mass of sulfate in barium sulfate = mass of sulfate in the unknown sample So the mass of sulfate in the unknown sample = 0.166g 2. Calculate the percentage by mass of sulfate in the unknown sample. Show your work. The percentage = the mass of sulfate in the unknown sample / the mass of the unknown sample * 100% =0.166g / 0.304g * 100% = 54.6% Gravimetric Analysis of an Unknown Sulfate Page 1 of 5 Santa Monica College Chemistry 11 3. Calculate the percentage by mass of the metal in the unknown sample. Show your work. Percentage by mass of the metal in the unknown sample = 1 – the percentage of sulfate in the unknown sample = 1 – 54.6% = 45.4% 4. The cation in your unknown metal sulfate ...
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Tags: Gravimetric analysis Unknown Sulfate mass of sulfate Mass of barium sulfate percentage by mass

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